import java.awt.Panel;
import java.awt.TextField;
import java.awt.Checkbox;
import java.awt.GridLayout;
import java.awt.Color;
import java.awt.event.*;

/**=============================================================
* Creates a TextField + CheckBox inside a Display class
* Value given at creation is the default AUTO value
*==============================================================*/
public class AxisValue extends Panel {
	TextField txtvalue;
	Checkbox  check;
	double value;
	double valueAuto;
	boolean state;
	private NotifyParent parent;

	public void setAuto(double a) {
		valueAuto = a;
		if(state) setValue(valueAuto);			
		}

	public void setManual(double a) {
		setState(false);
		setValue(a);			
		}

	public void setState(boolean s) {
		check.setState(s);
		setCheck(s);
		}

	public double getValue() {return value;}
	public boolean getState() {return state;}

	AxisValue(NotifyParent p, double v){
		// Make Layout		
		setLayout(new GridLayout(2,1));
		txtvalue = new TextField(String.valueOf(value), 10);
		txtvalue.setBackground(Color.lightGray);
		txtvalue.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e){
					String v1 = ((TextField)e.getSource()).getText();
					handleText(v1);
					parent.update();
				}
		});
		
		if(state) txtvalue.setEditable(false);
		else	  txtvalue.setEditable(true);
		add(txtvalue);
		check = new Checkbox("Auto");
		check.addItemListener(new ItemListener(){
			public void itemStateChanged(ItemEvent e){
				state = ((Checkbox)e.getSource()).getState();
				setCheck(state);
				if(state) parent.update();
			}
		});
		
		add(check);

		// Update components
		parent = p;
		value = v;
		setValue(value);
		state = true;
		setAuto(value);
		setState(state);
	}

	void setValue(double v){
		value = v;
		txtvalue.setText(String.valueOf(value));
		}

	void setCheck(boolean s){
		state = s;
		if(state) txtvalue.setEditable(false);
		else	  txtvalue.setEditable(true);
		if(state) {
			value = valueAuto;
			setValue(value);
			}
		}

	void handleText(String st)
	{double val;
	try {
		val = (new Double(st)).doubleValue();
	} catch(Exception e) {
			txtvalue.setText("0.");
			val = 0.;
			}
	value = val;
	}

}